Question

помогите пожалуйста
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Answer 1

1. α-β=30
α=30+β
α+β=180
30+β+β=180
2β=150
β=75
α=30+75
α=105

2.α=90+β
α+β=180
90+β+β=180
2β=90
β=45
α=90+45
α=135

3.α=3β
α+β=180
3β+β=180
4β=180/:4
β=45
α=3•45
α=135

4.α/β=1/5
β=5α
α+β=180
α+5α=180
6α=180/:6
α=30
β=5•30
β=150